diff --git a/apps/svelte.dev/content/tutorial/02-advanced-svelte/01-advanced-reactivity/02-reactive-classes/+assets/app-b/src/lib/App.svelte b/apps/svelte.dev/content/tutorial/02-advanced-svelte/01-advanced-reactivity/02-reactive-classes/+assets/app-b/src/lib/App.svelte
index aed4c7e3c0..bb5ded35d1 100644
--- a/apps/svelte.dev/content/tutorial/02-advanced-svelte/01-advanced-reactivity/02-reactive-classes/+assets/app-b/src/lib/App.svelte
+++ b/apps/svelte.dev/content/tutorial/02-advanced-svelte/01-advanced-reactivity/02-reactive-classes/+assets/app-b/src/lib/App.svelte
@@ -12,8 +12,8 @@
 		}
 
 		embiggen(amount) {
-			this.width += amount;
-			this.height += amount;
+			this.width = Math.min(MAX_SIZE, this.width + amount);
+			this.height = Math.min(MAX_SIZE, this.height + amount);
 		}
 	}